<?php
// +-------------------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +-------------------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +-------------------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +-------------------------------------------------------------------------------
// | Author: liu21st <>
// +-------------------------------------------------------------------------------
// | Mark: The corrected page class is just for admin page on every modules of TPD
// +-------------------------------------------------------------------------------
// $Id$


class Page extends Think {
	// 起始行数
	public $firstRow;
	// 列表每页显示行数
	public $listRows;
	// 页数跳转时要带的参数
	public $parameter;
	// 分页总页面数
	protected $totalPages;
	// 总行数
	protected $totalRows;
	// 当前页数
	protected $nowPage;
	// 分页的栏的总页数
	protected $coolPages;
	// 分页栏每页显示的页数
	protected $rollPage;
	// 分页显示定制
	protected $script;
	protected $up;
	protected $down;
	protected $config = array ('header' => '条记录', 'prev' => '上一页', 'next' => '下一页', 'first' => '第一页', 'last' => '最后一页', 'theme' => ' %totalRow% %header% %nowPage%/%totalPage% 页 %upPage% %downPage% %first% %prePage% %script% %up% %linkPage% %down% %nextPage% %end%' );
	
	/**
     +----------------------------------------------------------
	 * 架构函数
     +----------------------------------------------------------
	 * @access public
     +----------------------------------------------------------
	 * @param array $totalRows 总的记录数
	 * @param array $listRows 每页显示记录数
	 * @param array $parameter 分页跳转的参数
     +----------------------------------------------------------
	 */
	public function __construct($totalRows, $listRows, $parameter = '') {
		$this->totalRows = $totalRows;
		$this->parameter = $parameter;
		//$this->rollPage = C('PAGE_ROLLPAGE');
		$this->rollPage = 1000;
		$this->listRows = ! empty ( $listRows ) ? $listRows : C ( 'PAGE_LISTROWS' );
		$this->totalPages = ceil ( $this->totalRows / $this->listRows ); //总页数
		$this->coolPages = ceil ( $this->totalPages / $this->rollPage );
		$this->nowPage = ! empty ( $_GET [C ( 'VAR_PAGE' )] ) ? $_GET [C ( 'VAR_PAGE' )] : 1;
		if (! empty ( $this->totalPages ) && $this->nowPage > $this->totalPages) {
			$this->nowPage = $this->totalPages;
		}
		$this->firstRow = $this->listRows * ($this->nowPage - 1);
	}
	
	public function setConfig($name, $value) {
		if (isset ( $this->config [$name] )) {
			$this->config [$name] = $value;
		}
	}
	
	/**
     +----------------------------------------------------------
	 * 分页显示输出
     +----------------------------------------------------------
	 * @access public
     +----------------------------------------------------------
	 */
	public function show() {
//		if ($this->listRows >= $this->totalRows)
//			return '';
		$p = C ( 'VAR_PAGE' );
		$nowCoolPage = ceil ( $this->nowPage / $this->rollPage );
		$url = $_SERVER ['REQUEST_URI'] . (strpos ( $_SERVER ['REQUEST_URI'], '?' ) ? '' : "?") . $this->parameter;
		$parse = parse_url ( $url );
		if (isset ( $parse ['query'] )) {
			parse_str ( $parse ['query'], $params );
			unset ( $params [$p] );
			$url = $parse ['path'] . '?' . http_build_query ( $params );
		}
		//上下翻页字符串
		$upRow = $this->nowPage - 1;
		$downRow = $this->nowPage + 1;
		if ($upRow > 0) {
			$theFirst = "<a href='" . $url . "&" . $p . "=1' >" . $this->config ['first'] . "</a>";
			$upPage = "<a href='" . $url . "&" . $p . "=$upRow'>" . $this->config ['prev'] . "</a>";
		} else {
			$theFirst = $this->config ['first'];
			$upPage = $this->config ['prev'];
		}
		
		if ($downRow <= $this->totalPages) {
			$downPage = "<a href='" . $url . "&" . $p . "=$downRow'>" . $this->config ['next'] . "</a>";
		} else {
			$theFirst = "<a href='" . $url . "&" . $p . "=1' >" . $this->config ['first'] . "</a>";
			$downPage = $this->config ['next'];
		}
		
		// << < > >>
		if ($nowCoolPage == 1) {
		
		} else {
			
			$preRow = $this->nowPage - $this->rollPage;
			// $prePage = "<a href='".$url."&".$p."=$preRow' >上".$this->rollPage."页</a>";
			$theFirst = "<a href='" . $url . "&" . $p . "=1' >" . $this->config ['first'] . "</a>";
		}
		
		if ($this->nowPage == $this->totalPages) { //最后一页
			// echo '-------'.$nowCoolPage.'----'.$this->totalPages.'---';
			// $nextPage = $this->config['next'];     
			$theEnd = $this->config ['last'];
		} else {
			//echo '-------'.$nowCoolPage.'----'.$this->totalPages.'---';
			$nextRow = $this->nowPage + $this->rollPage;
			$theEndRow = $this->totalPages;
			// $nextPage = "<a href='".$url."&".$p."=$nextRow' >下".$this->rollPage."页</a>";
			$theEnd = "<a href='" . $url . "&" . $p . "=$theEndRow' >" . $this->config ['last'] . "</a>";
		}
		
		// 1 2 3 4 5
		$script = '<script type="text/javascript">
		<!--
		function MM_jumpMenu(selObj){ //v3.0
		var url=selObj.options[selObj.selectedIndex].value;
		open(url,"_self"); //这里设置在那里显示 显示方式 __blank __parent __top 等 这里的 mainFrame 是在名叫 mainFrame这个框架中显示
		}
		//-->
		</script>';
		
		$up = '<select name="jumpMenu" id="jumpMenu" style="padding:1px;" onchange="MM_jumpMenu(this)">';
		$linkPage = "";
		$down = '</select>';
		$selected = "";
		
		for($i = 1; $i <= $this->rollPage; $i ++) {
			$page = ($nowCoolPage - 1) * $this->rollPage + $i;
			
			if ($page != $this->nowPage) {
				
				if ($page <= $this->totalPages) {
					//   $linkPage .= "&nbsp;<a href='".$url."&".$p."=$page'>&nbsp;".$page."&nbsp;</a>";
					$ul = $url ."&". $p . "=" . $page;
					
					if ($this->nowPage == $page) {//判断当点跳转菜单显示的页
						$selected = 'selected="selected"';
						$linkPage .= "<option value=\"$ul\" $selected >第 $page 页</option>";
					
					} else {
						$linkPage .= "<option value=\"$ul\">第 $page 页</option>";
					}
				} else {
					break;
				}
			} else {
				
				if ($this->totalPages != 1) {
					
					if ($this->nowPage == $page) {//判断当点跳转菜单显示的页面
						$selected = 'selected="selected"';
						$linkPage .= "<option value=\"$ul\" $selected >第 $page 页</option>";
					} else {
						$linkPage .= "<option value=\"$ul\">第 $page 页</option>";
					}
				
				} else {
					$linkPage .= "<option value=\"$ul\" $selected >第 1 页</option>";
				}
			}
		}
		$pageStr = str_replace ( array ('%header%', '%nowPage%', '%totalRow%', '%totalPage%', '%upPage%', '%downPage%', '%first%', '%prePage%', '%script%', '%up%', '%linkPage%', '%down%', '%nextPage%', '%end%' ), array ($this->config ['header'], $this->nowPage, $this->totalRows, $this->totalPages, $theFirst, $upPage, $downPage, $theEnd, $script, $up, $linkPage, $down, $nextPage, $prePage ), $this->config ['theme'] );
		return $pageStr;
	}

}
?>
